Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d68f44fafe964b6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-28 23:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ae44e52c4905f9e840b68743ebabeb5 SHA-1: 6e82d5a4793fe8d1a865e6911dfa4b3342ed5d8e SHA-256: 7d68f44fafe964b6825f15a1f337ac6261adbf189954dcab6e6372e03690f620
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for movie downloads, aligning with a phishing or scam attempt. The presence of numerous PDF links, many pointing to benign Shopify URLs, suggests a link farm tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=kong+skull+island+full+movie+mp4+dow
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/league_of_graphs.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/bring_up_genius.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7746/files/85481128814.pdf
    • https://cdn.shopify.com/s/files/1/0431/3605/7501/files/nigimegusegute.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0812bb7e82e41c58e9700235dc98bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e41bf04d25d40b1af3d2ff4f7f16f33.pdf
    • https://static.usrfiles.com/ugd/b8c837_06c2953bfe0242299008cf429c93311e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/35343225273.pdf
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/beginner_python_programming.pdf
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/mimig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6471/files/3252388142.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/918013728.pdf
    • https://cdn.shopify.com/s/files/1/0441/2915/7272/files/reading_comprehension_test_beginner.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a04.bin
4ad103e4f7209aff68c9b12bcf08ee58cd18e4a0d215e94ce90f6ab43fa6a540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A04 5540 bytes
font_01_sfnt_off00005cf0.bin
590af80d528e18f317de2f109ec6eb7fb8afe021be351532dd424e9d5c6d9a1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF0 9608 bytes
font_02_sfnt_off00007e18.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E18 18776 bytes

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